verifier.org

Synthflow

free to build, undisclosed to run, and $30,000 a year to buy properly.

unpublished#enterprises-who-want-tel#concurrency#integrations

a coherent enterprise offering with the least public pricing of the nine — you can build an agent for free and cannot find out what running it costs.

the enterprise proposition is legible even though the price isn't: sla, native telephony or sip trunking, custom concurrency planning with routing, escalation and fallback logic, integrations, a security review and launch support, all scoped into a contract starting at $30,000 a year.

the self-serve side is where it falls down. you can build and test agents from templates at no cost, and costs begin only when an agent goes live — but the per-minute rate for a live agent is not published anywhere, for either tier. of nine vendors this is the only one with no rate card at all.

the description above is ours, condensed from the ranking. pricing moves — check it on the vendor's own page before you rely on it.

pricing
unpublished
our verdict

a coherent enterprise offering with the least public pricing of the nine — you can build an agent for free and cannot find out what running it costs.

we researched this category against vendors' own pricing pages and licence files. that is where this line comes from — not from the vendor, and not from anything they paid for.

more ai voice agent platforms

Deepgram Voice Agent

speech, model and synthesis in one websocket api

#websocket#single-api

Phonely

phone agents for inbound call handling and appointment booking

#inbound#booking

Regal

outbound and inbound ai calling built on a contact-centre stack

#contact-centre

Retell AI

we checked this$0.07/min

the only vendor whose headline band already includes telephony, stt, tts and the llm — with the sub-rates printed underneath.

#teams-who-want-one-numbe